There are projects actively using this. It was designed to allow you to overlay events for participants on a time line as well as data from datasets. It does have a bit of an API but it's not one we officially support, and I am not familiar with it. If this style chart fits your needs exactly then it probably wouldn't hurt to use, however, if you need something a bit more custom I would consider using something else, such as our new vis library. You could also possibly use our time charts, but I'm not sure what exactly your use case is.